Drilling machine



Dec, 30. 1924. 1,521,330

w. T. SEARS DRILLING MACHINE FilevdrJa. 19. 1923 INVENTORh BY@ ,1b -2 ATTORNEY Patented Dec. 30, 1924.

UNITED STATES 1,521,330 PATENT OFFICE.

WILLARD T. SEARS, OF MONTCLAIR, NEW JERSEY, ASSIGNOR T0 NILES-BEMENT-POND COINEPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

DRILLING MACHINE.

Application led January 19, 1923. Serial No. 613,743.

To all' whom t may concern.:

Be it known that I, VVILLARD T. SEARS, a citizen of the United States, residing at Montclair, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Drilling Machines, of which the following is a specification.

This invention relates to drilling machines and particularly to radial drilling machines wherein a radial drill supporting arm is vertically adjustably mounted on a supporting column, such a machine being usually provided`with means for adjusting the drill supporting arm on the column and with a clamping means for securing the arm to the column in its adjusted position.

It is a particular object of this invention to provide improved means, comprising a unitary manually operable device, as the single pivoted lever illustrated for moving both the arm adjusting means and the clamping means into their operative and inoperative positions, the device and means being so related that when either means is in the operative position the other means is in the inoperative position.

With the above and other objects in view, my invention consists in the features of construction and operation set forth in the following specification and illustrated in the accompanying drawing. In such drawing annexed hereto and forming a part of this specification, I have shown one embodiment of my invention but it will be understood that the invention can be otherwise embodied and that the drawing is not to be construed as defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purose. p Referring to the figures of the drawing:

Figure 1 is a front elevation of a radial.. drilling machine embodying my invention.

Fig. 2 is an enlarged horizontal section of a portion of the machine taken on line 2-2 of Fig. 1.

Fig. 3 is an enlarged fragmentary front elevation of the machine showing the arm clamped to the column and the arm adjusting mechanism in the inoperative position.

Fig. 4 is a like view but showing the arm clamping mechanism in the unclamped position and the arm adjusting mechanism in the operative position.

Fig. 5 is an enlarged fragmentary horizontal sectional view through one of the clamping elements on line 5-5 of Fig. 3.

In the drawing, I have illustrated a radial drilling machine comprising the usual base 1 with a column 2l thereon and a radial drill supporting arm 3 adjustable vertically on the column. A saddle 4 with a drill spindle 5 mounted thereon is supported for adjustable movement along the arm 3 on one side of the column and a driving means, as the motor 6, with the gearing illustrated in dotted lines in Fig. 1, is supported on the opposite side of the column. I have furthermore illustrated means for vertically adjusting the arm on the column, clamping means for securing the arm in its adjusted position, and a unitary device, as the pivoted lever illustrated, for shifting-both such means into their operative and inoperative positions.

The arm 3 isadapted to be adjusted vertica-lly on the column 2 preferably from the motor 6 through the following mechanism: A pinion 7 keyed to the motor shaft meshes with a gear 8 loosely `mounted on the arm shaft 9. Connected with the gear 8 is a pinion 10 which meshes with a gear 11 on a countershaft 12. One element 13a of a toothed clutch 13 is splined to the countershaft 12. The other element 13b of such clutch is provided with a socket 14 adapted to rotatably support the end of the shaft 12 therein. The element 13b of the clutch is keyed to a short shaft 15 having a bevel gear 16 thereon meshing with a bevel gear 16 secured to a rotatable nut 17 in threaded engagement with a screw 18. This screw is non-rotatably supported on the column at 19 and the nut 17 serves to support the entire weight of the arm and the adjusted parts thereof upon the screw. Preferably a ballbearing 20 is interposed between a bearing 21 on the arm and the nut. collar 22 prevents downward movement of 100 the nut with respect to the bearing.

The means for clamping the arm to the column in its 'adjusted position is particularly illustrated in F ig, 2 and preferably comprises the following mechanism Set 105 into grooves formed at the junction of the column 2 and arm 3 are complementa] clamping members 23 which as will hereinafter appear move up and down with the arm 3 and also are adapted to engage 110 against the column 2 when itis desired to clamp the arm 3 in the adjusted position on the column. Extending through these clamping members 23 are rods 24, each rod at one end being provided with holding and check nuts 25 and being prevented from rotation by any suitable means, while their,y other ends are furnished 'with clamping nuts 26. The exterior contour of these nuts 26 are preferably cylindrical and the outer ends thereof are notched at 27 whereby they may be engaged by a wrench to rotatably adjust the same to the proper clamping position.

As heretofore stated, the primary object of this invention is to provide a unitary device, as the lever 28 illustrated, for shifting both the arm elevating clutch 13 and the clamping nuts 26 into their operative and inoperative positions. As illustrated,

the lever 28 is pivoted to the arm at 29 and a fork 28a thereon engages the clutch 13a. The clutch may thereby be engaged and the arm 3 be moved vertically in either direction directly from the motor 6. An o erat-ing lever 30 is engaged over each c amping nut 26 and may be secured in adjusted position thereon by means of set screws 31. The laterally extending arms of the levers are connected to a second fork 28 of the lever 28 by means of links 32 and 33. It will therefore be seen that movement of the lever 28 on its pivot' 29 is adapted to rotate the clamping nuts 26.

With the lever 28 in the position shown inl Fig. 3, the'arm adjusting clutch 13EL is in the inoperative position illustrated and the clamping nuts 26 are in thearm clamping position, the nuts 26 being threaded to the rods l24: by left hand threads as illustrated. When it is desired to move the arm 3 vertically on the column, the lever f 28 is moved from the position shown in Fig. 3 to the position shown in Fig. 4, whereby the nuts 26 are rotated in the unvclamping direction and the clutch; 13'l is engaged to move the arm on the column. It will be understood that by loosening the set screws 31 the nuts 26 may be accurately adjusted to a position wherein the nuts will be in an unclamped position when the clutch is engaged (F ig. 4) and in a clamped pgsitioi) when the clutch is disengaged In order to prevent any adjustment of the nuts 26 and therefore a clamping of the arm when the arm adjusting clutch 13a -is engaged, I mount a plate 34 on the outer end of-link 32 and a plate 35 on the outer end of link 33, such plates being mounted 'integral with the links. or otherwise. When the clutch is in the disengaged position, these plates are positioned laterally of the ends of the nuts 26 and such nuts are accessible for adjusting purposes (Fig. 3);

however, when the clutch is movedto the engaged position, the plates are also moved over Ythe endl of the nuts (Fig.-4:) whereby the nuts may not be adjusted at such time.

What I claim is:

1. In a drilling machine, the combination of a support, an arm adjustable thereon, means for adjusting the arm, means for securing the arm to the support in adjusted position, and a unitary manually operable device for moving both such means 'into operative and inoperative positions, the device and means being so related that when either means is in the operative position the other means is in the inoperative position.

2. In a drilling machine, the combination of a support, an arm adjustable thereon, means for adjusting the arm, means for securing the arm to the support in adjusted position, and a single pivoted lever for controlling both such means, the lever and means being so related that movement of the lever in one direction causes the securing means to become inoperative and the arm ad justing means to become operative and movement thereof in the opposite directionk causes the arm adjusting means to become inoperative and the securing means to become operal tive. 95

3. In adrilling machine, the combination of a support, van arm adjustable thereon, means including a clutch for adjusting the arm, means for securing the arm to the sup-l port in adjusted position, and a lever piv- 10" oted to the arm and having a portion thereof connected to the clutch and another' portion connected to the securin means, the several parts being so arrange thatmovement of the lever in one direction releases the secur- 105 ing means and closes the clutch and movement thereof in the opposite direction opens the clutch and engages the securing means.

4. In a drilling machine, the combination of a support, an arm adjustable thereon,

means for adjusting the arm, screw threaded means for securing the arm to the support in adjusted pOsition, a pivoted lever having aV portion thereof operatively connected to the screw threaded means and another portion connected to the adjusting means, the construction being such that movement of the lever in one direction moves the screw ,threaded means in an unclamplng direction mensen eratively connected to the screw threaded means `and another portion connected to the clutch, the construction being such that movement of the lever in one direction moves the screw threaded means in an unclamping l direction and engages the clutch and movement thereot` in the opposite direction disengages the clutch and moves the screw threaded means in the clamping direction.

6. ln a drilling machine, the combination of a support, an arm adjustable thereon, means for adjust-ing the arm, means for securing the arm to the support in adjusted position, a unitary device for moving both such means into operative and inoperative positions, the device and means being so related that when either means is in the operative position the other means is in the inoperative position, and means movable over the securing means when the latter is moved to the inoperative position whereby to prevent adjustment of the securing means when the arm adjusting means is in the operative position.

7. In a drilling machine, the combination of a support, an arm adjustable thereon, means for adjusting the arm, a' pair of rotary clamping means on the arm for securing the arm to the support in adjusted position, a lever pivoted to the arm and operatively connected to the adjusting means, and a pair of links operatively connecting the lever to the clamping means, the construction being such that movement of the lever in one direction moves the clamping means in an unclamping direction and engages the arm adjusting means and movement thereof in the opposite direction disengages the arm adjusting means and moves the clamping means in the clamping direction.

8. In a drilling machine, the combination of a support, an arm adjustable thereon, means for adjusting the arm, means for securing the arm to the support in adjusted position, a unitary manually operable device forl moving both such means into operative and inoperative positions, the device and means being so related that when either means is in the operative position the other means is in the inoperative position, and means for adjusting the securing means relative to the said device.

9. In a radial drilling' machine, the combination of a column, an arm vertically adjustable thereon, a drill spindle mounted on the arm, Wer means for operating t-he spindle, screw means for adjusting the arm vertically on the column, a clutch connection bef tween the power means and screw means, clamping means for securing the arn to the column in adjusted position, and a lever pivoted to the arm and having a portion thereof connected to the clutch and another portion connected to the securing means, the several parts being so arranged that movement of the lever in one direction releases the securing means and closes the clutch and movement thereof in. the opposite direction opens the clutch and engages the securing means.

ln testimony whereof, l hereto afiix my signature.

WILLARD T. SEARS. 

